Re: [BUG] Regression introduced with "block: split bios to max possible length"

[Jens Axboe]

On 01/21/2016 07:57 AM, Stefan Haberland wrote:
> Hi,
>
> unfortunately commit e36f62042880 "block: split bios to maxpossible length"
> breaks the DASD driver on s390.  We expect the block requests to be
> multiple
> of 4k in size. With the patch applied I see the requests split up in
> multiple
> of 512 byte and therefore the requests get rejected and lots of I/Os fail.

Sigh, that's definitely a bug. I'll take a look at it and see if I can 
get a tested fix in for 4.5-rc1. If not, we'll revert it, again.


--
Jens Axboe